Mitsubishi Electric MELSEC iQ-R16MTCPU, Programming Manual

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5 POSITIONING CONTROL
5.21 Home Position Return
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5
Home position return by the count method 2
Count method 2
After the proximity dog ON, the position which traveled the specified distance (travel value after proximity dog ON) is home
position in this method.
It is not related for zero point pass or not pass.
A count method 2 is effective method when a zero point signal cannot be taken. (However, dispersions will occur to the stop
position at the home position return compared with the count method 1.)
The travel value after proximity dog ON is set in the home position return data (

Page 178 Home Position Return Data).
Home position return by the count method 2
Operation of home position return by count method 2 is shown below.
Home position return execution
Home position return by the count method 2 is executed using the servo program. (

Page 378 Servo program for home
position return)
Cautions
• Home position return and continuously start of home position return are also possible in the proximity dog ON in the count
method 2. When the home position return and continuously start of home position return are executed in the proximity dog
ON, the home position return is executed after return the axis once to position of the proximity dog OFF.
• When the "travel value after proximity dog ON" is less than the deceleration distance from "home position return speed" to
"creep speed", a minor error (error code: 1A57H) will occur and deceleration stop is made.
• Command position is the home position.
• If "[St.1062] In-position (R: 32n/Q: M2402+20n)" does not turn ON, home position return is not ended.
V
Home position
return direction
Home position
return speed
t
Proximity dog
Home position
return start
Creep speed
After the proximity dog ON, a position
which traveled the distance "travel value
after proximity dog ON" of the home
position return data is home position. *:
The travel value in this range is stored in the monitor
register "travel value after proximity dog ON".
*: "Home position return re-travel value" = 0